Help 4 Beginners
This page is dedicated to those new to the hobby. Throughout the years I have been asked some very
basic questions. I hope the answers are informative and help build a foundation of knowledge, which
will enhance your collecting experiences. My favorite answer is "We are all new at this; some of us
are newer than others". ENJOY!
Question: I have a leather sling marked MRT. Who is this manufacturer?
Answer: MRT is not a manufacturer's abbreviation. Mildew Resistant Treatment (MRT) is an anti rot
treatment applied to some leather and web items. Most 1945 manufactured web items I've inspected
over the years were evidently headed for the tropics. Most GI production during the last year of the
war was marked "Fungus Proofed" or FP. The earliest MRT marking I have observed is 1947.
Question: My Garand rifle has a lock screw that has one large screwdriver slot. I've seen no reference
to it, anywhere.
Answer: The reason you've see no reference to it, is this lock screw was produced for M1's that were
in service in South America. I'm not sure if the screw was made there, my suspicions are it was
produced here and sold to South American governments by American parts dealers back in the
1960's and 1970's.
Question: I purchased a cleaning rod for my M1 carbine and the dealer said it was complete. There is
a section missing out of one of the compartments of the web carrier.
Answer: The rod you purchased is designated Rod, Cleaning, M8. This rod was engineered
specifically for the M1 carbine. Your dealer was correct, it is complete.
The rod consists of an aluminum or steel "T" handle with a shaft attached. The second section is a
unique length, just for the carbine. The overall length is such that you will not damage tips or
brushes by ramming the back of the receiver. The case is designated Case, Carrying, M1. This case is
also used for the sectional machine gun rod which consists of an extra section, thus when used with
the M8, one compartment is empty.
Question: I have a web sling that has an anchor on the hardware. Does that mean the sling was
contracted by the Navy?
Answer: No. The piece that has the anchor stamped into it is called the sling keeper. The anchor
indicates the keeper was produced by North & Judd of Middletown, Ct. Sling manufactures produce
neither the webbing, nor the hardware. They simply purchase the raw materials and sew the sling into
the required configuration.
Question: I saw a reference to a cleaning rod which was designated as Barracks Rod. What does that
mean?
Answer: In the past rifles were stored in arms racks under lock and key. These racks were stored
within the sleeping facilities of the troops, called barracks. Barracks cleaning rods were nonsectional
(one piece) and were used for cleaning the firearms when the troops returned from the field.
One piece cleaning rods are stronger and unlike the sectional field type, there are no sections to
break or bend.
Question: What is a grenade blank?
Answer: Actually there is not such designation as a grenade blank. It is a very dangerous term used
by those who are careless. A blank has very low pressure from a fast burning powder. It is designed
to emit a loud bang, simulating small arms fire. A grenade cartridge has a full powder charge from a
slow burning powder, resulting in much higher pressures. One way to describe it is, it's a higher
powder charge than normal small arms ammunition, without the bullet. Grenade cartridges propel
heavy rifle grenades and pyrotechnic signals at high velocities. To attempt to use a grenade cartridge
in place of a blank can result in serious injury. For American GI ammunition the following will help
identify differences:
- Cal. .30 M1909 Blank - Diameter roll, visible wad
in mouth. Post 1999 Production has a star crimp, different in appearance
than the Grenade Cartridge, but it takes experience to tell the
differences. Inexperienced personnel may have trouble distinguishing the
two.
- M3 Grenade Cartridge - Closed Star crimp, also known as a Rose Petal Crimp.
- Cal. .30 Carbine M6 Grenade Cartridge, Carbine - Closed rose petal crimp. There never was a carbine blank adopted by US forces.
- Cal. 7.62 NATO M192 Blank - Diameter roll, with false bullet as part of case for ease of feeding.
- M64 Grenade Cartridge - Rose petal crimp, opened mouth.
- Cal. 5.56 mm M200 Blank - 7 point closed rose petal crimp.
- M195 Grenade Cartridge - same as above These two
are typical of a government issue screw up. The cartridges are identical
in appearance and configuration. The only way to distinguish them is by
a knurled ring about 1/2 inch up from the base of the Blank Cartridge.
The Grenade Cartridge has no knurled ring. You will see all sorts of
material printed about different colors used on the crimped end. Never
go by the colors. Look for the knurled ring and be safe.
Question: What is the difference between a plated bore and a lined bore?
Answer: In the history of the Ordnance Dept. the research personnel were always looking for ways to
extend bore life and help stop corrosion. Plated and lined bores were the answer. A plated bore is
one which is chrome plated, usually from the beginning of the chamber to the muzzle. This helps
fight the battle against rust and gives the bore a considerably longer life. A lined bore is one which
has a 9 inch stellite liner, which starts at the end of the chamber. Stellite is an incredibly hard
material and was used only in machine gun barrels. Aircraft machine gun barrels with stellite were
rated at 6-7000 rounds of life, versus 1500 for unlined barrels of the same type. Stellite, although it
does not have the same resistance to rust as chrome, will extend barrel life far beyond that of
chrome. Here is a list of US accepted barrels I have observed:
Chrome |
Satellite |
M14 |
M1919A4/M37 |
1911A1 .45 Auto |
M1919A6 |
M1919A4/M37 M2 HB |
Cal. .50 |
M1919A6 M2 AC |
Cal. .50 |
M16 |
M60 |
Question: What is a blank adapter?
Answer: While blank adapter is a common term, the designation is Blank Firing Attachment. When a
blank is fired to simulate gunfire, there is no projectile. Without a projectile, all the burning gases
escape from the muzzle. A blank firing attachment attaches to the muzzle end of the barrel and
constricts precise amounts of gas. This constriction causes backpressure which feeds gases to the
gas system of the firearm, allowing semi automatic, or automatic fire. Remove the BFA and the
firearm becomes a repeater when used with blanks. Blanks can be very dangerous as they propel
pieces of wad. NEVER point a firearm at anybody, even when shooting blanks. You will see for sale
BFA's for the M1 carbine. This is a foreign manufactured item for use with blanks specifically
produced for this attachment. Using this attachment with any other blank can result in injury or
damage to your carbine. It is a great collectable to purchase, but don't ever use it as intended.
Question: What is meant by bore sighting?
Answer: Bore sighting is often used during production and rebuilding of small arms. It is used
strictly to align the front and rear sights with the estimated point of impact of the bore. It does not
take into consideration elevation, it estimates only windage. In the early days a long steel rod was
inserted into the muzzle of the bore. Attached to the rod was an elbow telescope, which projected the
bore's centerline to the eye of a viewer. The viewer then looked through the telescope and saw where
the bore was pointing. He then adjusted the sights to the point he just observed. This procedure of
aligning the sights to the bore, without firing a shot, is call bore sighting. In modern times bore
sighting is done with lasers, and is not as important to rifles as it is machine guns. It would take
enormous quantities of ammunition to align the sights of machine guns. Instead the machine gun is
bore sighted, and only a small amount of ammunition is used to confirm or refine the sight
adjustment.
Question: What was the status of the metal 1903 sight cover/protector. Was it ever used in the field.
Answer: This question will be debated until hell freezes over. Those that think it was just a shipping
protector point out that it is very difficult to sight in on a target with the cover attached. They also
point to WWII photos and all seem to be lacking the sight cover. There are those that say it was used
in the field and point out that the cover can be removed and reinstalled upside down to make sighting
easier. There are those to subscribe to the theory that if it was made, it was intended to be used in
the field. The debate will go on. Whatever you decide to believe, I highly recommend that your
03/03A3 have one installed. An unfortunate fall on the front sight, and you can have a large repair bill.
Depending upon the damage, removal of old and installation of new sights, can be quite a challenge
to some people. Play it safe. They are cheap enough.
For questions and/or assistance:
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